Fouling indicators for field monitoring the effectiveness of operational strategies of ultrafiltration as pretreatment for seawater desalination

Gu, Hanyang; Rahardianto, Anditya; Gao, Larry X.; Pascual, Xavier; Giralt, Jaume; Ralló, Robert; Christofides, Panagiotis D.; Cohen, Yoram

doi:10.1016/j.desal.2017.11.038

Cited by 23 publications

(6 citation statements)

References 67 publications

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“…As shown in Figure 7, pristine membranes displayed the highest average roughness (Ra) of 141.5 nm and the root mean square (rms) 168.9 nm compared with modified membranes. Such results demonstrated that the improved antifouling property of hybrid membranes benefited from low surface roughness to a certain extent 87–89 …”

Section: Resultsmentioning

confidence: 86%

“…Such results demonstrated that the improved antifouling property of hybrid membranes benefited from low surface roughness to a certain extent. [87][88][89] 4 | CONCLUSION GO produced through the Improved Hummer's method was used as a substrate to graft 2-(N-3-Sulfopropyl-N,Ndimethyl ammonium)ethyl methacrylate using the RATRP method. Both GO and PSBMA@GO were incorporated into the CA matrix using the phase inversion method The effect of GO and PSBMA@GO nanocomposites on CA membranes were assessed based on surface morphology and hydrophilicity, water permeability, dye rejection and antifouling performance.…”

Section: Antifouling Performancementioning

confidence: 99%

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2‐(N‐3‐Sulfopropyl‐N,N‐dimethyl ammonium)ethyl methacrylate modified graphene oxide embedded into cellulose acetate ultrafiltration membranes for improved performance

Xabela

Moutloali

2022

J of Applied Polymer Sci

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N-(3-sulfopropyl)-N-(methacryloxyethyl)-N,N-dimethylammonium betaine (SBMA) modified graphene oxide composite used as a filler in the fabrication of a nanocomposite cellulose acetate membrane was grafted through reverse atom transfer radical polymerization (RATRP) technique from a GO-Br precursor. All the prepared materials (GO, GO-Br, PSBMA@GO) were characterized using a combination of FTIR, BET, TEM, TGA, RAMAN, and XRD. The effect of different GO and PSBMA@GO contents on cellulose acetate membranes was investigated using AFM, contact angle measurements and SEM techniques. The surface hydrophilicity of the fabricated membranes increased with increasing content of PSBMA@GO filler through the water contact angle method. The relative flux of the base membrane at 900 kPa was 66.6 L.m À2 . h À1 compared to that of PSBMA@GO composite membrane (0.5 wt%) at 117.67 L.m À2 .h À1 . The addition of the PSBMA@GO composites resulted in increased fouling resistance with high-flux recovery (93%) and low-overall flux decrease ratios (0.01%). Furthermore, nanocomposite membranes exhibited higher dye rejections for Congo Red (CR, 99.1% hence confirming their UF nature), methyl orange (MO, 84.2%) and methylene blue (MB, 95.3%) dyes compared with unmodified CA membranes. Overall, these nanocomposite membranes showed promising properties as potential candidates for dye removal in textile wastewater.

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Section: Resultsmentioning

confidence: 86%

Section: Antifouling Performancementioning

confidence: 99%

2‐(N‐3‐Sulfopropyl‐N,N‐dimethyl ammonium)ethyl methacrylate modified graphene oxide embedded into cellulose acetate ultrafiltration membranes for improved performance

Xabela

Moutloali

2022

J of Applied Polymer Sci

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“…Eq. ( 3) is valid for both units depending on the definition of the bulk concentration in the equation which could be expressed as concentration (kg.m -3 ) [1,4,[7][8][9], or as the bulk volume fraction occupied by particles or colloids in the feed suspension (dimensionless) [11,30,[31][32][33]. It is important to mention here that the trends of α variation with the different operating parameters and the interpretation of results presented in this paper remain the same regardless of the unit used.…”

Section: Theorymentioning

confidence: 91%

Membrane fouling quantification by specific cake resistance and flux enhancement using helical cleaners

Ghaffour

Qamar

2020

Separation and Purification Technology

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“…Therefore, the performance of UF as a pretreatment method outweighed that of MF and the conventional system. A similar study by Gu et al [79] used a pilot plant to evaluate the effectiveness of UF in pretreating feedwater to a RO unit and concluded that it increased the backwash efficiency by almost 36%. Monnot et al [80] further enhanced the performance of UF as a pretreatment method by preceding it with a granular activated carbon (GAC) unit.…”

Section: Feedwater Pretreatmentmentioning

confidence: 98%

A Comprehensive Review on Membrane Fouling: Mathematical Modelling, Prediction, Diagnosis, and Mitigation

AlSawaftah

Abuwatfa

Darwish

et al. 2021

Water

149

101

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Membrane-based separation has gained increased popularity over the past few decades, particularly reverse osmosis (RO). A major impediment to the improved performance of membrane separation processes, in general, is membrane fouling. Fouling has detrimental effects on the membrane’s performance and integrity, as the deposition and accumulation of foulants on its surface and/or within its pores leads to a decline in the permeate flux, deterioration of selectivity, and permeability, as well as a significantly reduced lifespan. Several factors influence the fouling-propensity of a membrane, such as surface morphology, roughness, hydrophobicity, and material of fabrication. Generally, fouling can be categorized into particulate, organic, inorganic, and biofouling. Efficient prediction techniques and diagnostics are integral for strategizing control, management, and mitigation interventions to minimize the damage of fouling occurrences in the membranes. To improve the antifouling characteristics of RO membranes, surface enhancements by different chemical and physical means have been extensively sought after. Moreover, research efforts have been directed towards synthesizing membranes using novel materials that would improve their antifouling performance. This paper presents a review of the different membrane fouling types, fouling-inducing factors, predictive methods, diagnostic techniques, and mitigation strategies, with a special focus on RO membrane fouling.

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Fouling indicators for field monitoring the effectiveness of operational strategies of ultrafiltration as pretreatment for seawater desalination

Cited by 23 publications

References 67 publications

2‐(N‐3‐Sulfopropyl‐N,N‐dimethyl ammonium)ethyl methacrylate modified graphene oxide embedded into cellulose acetate ultrafiltration membranes for improved performance

2‐(N‐3‐Sulfopropyl‐N,N‐dimethyl ammonium)ethyl methacrylate modified graphene oxide embedded into cellulose acetate ultrafiltration membranes for improved performance

Membrane fouling quantification by specific cake resistance and flux enhancement using helical cleaners

A Comprehensive Review on Membrane Fouling: Mathematical Modelling, Prediction, Diagnosis, and Mitigation

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